dnsdist: Fix TCP short writes handling

diff --git a/pdns/iputils.cc b/pdns/iputils.cc
index 8b8601966d2f73bf94faa29c96d5482fb7a932f2..53308e5d6201a7a92d3db2dce4dc1784a20bd4d6 100644 (file)
--- a/pdns/iputils.cc
+++ b/pdns/iputils.cc
@@ -357,6 +357,7 @@ bool sendSizeAndMsgWithTimeout(int sock, uint16_t bufferLen, const char* buffer,
       do {
         if (written < iov[pos].iov_len) {
           iov[pos].iov_len -= written;
+          iov[pos].iov_base = reinterpret_cast<void*>(reinterpret_cast<char*>(iov[pos].iov_base) + written);
           written = 0;
         }
         else {